3-needle bind off
Measure 4 inches on your piece of knitted work then count the number of stitches (including partials!). Why? Because gauge determines the actual size of your piece. For example, a sweater knitted at a gauge of 5 stitches to the inch with 200 cast on stitches would be 40" around. Change the gauge to 4 1/2 stitches per inch and your sweater balloons to 44.4" around.
The cast of The Sweater - 1980 includes: Roch Carrier as Narrator
The cast of How to Knit a Sweater - 2012 includes: Ember Fulson
The cast of A Hole in Her Sweater - 2010 includes: Jenn Threatt as Annie
The cast of Green Sweater Guy - 2015 includes: Melissa Woodside as Rachel
The cast of Sweater Rojo - 2014 includes: Carlos Docampo as Linyera Camila Duro as Ella
You probably are making a sweater. Check the pattern on how to cast off stitches and make sure you jump on the track of the pattern of the sweater. This is to make the bottom part of the armholes of a sweater.
The cast of Sweater Song - 2013 includes: Danijel Mandic as The Boss Shannah Williams as Commercial Girl Ashley Zimmerman as The Girl
The cast of The Penitent Sweater - 2009 includes: Christopher Houldsworth as Zebulon Pike June Letourneau as Julia Dixon Susannah Richardson as Lucy Pike
The cast of Sweater People - 2006 includes: Holly Doward as Danah Sally Golan as Zee Virna Kim as Kate Antonino Pruiti as Jason
The cast of The Christmas Conspiracy - 2008 includes: Sarah Blandford as Jane Duckett Josh Blandford as Jim Duckett Jennifer Clary as Mrs. Duckett Christian Kane as Doug Davidson Dick Van Patten as Narrator
You'll just have to start over because there actually is no other way unless you know where in the first row you knitted the tail. I think it would be better to start over because it's more then likely the project will not look as well as it could.